chengji=float(input("输入赵本山的考试成绩:"))
if chengji>100:
    print("输入错误")
else if chengji==100:
    print("爸爸给他买辆车")
elif chengji>=90:
    print("妈妈给他买MP4")
elif chengji>=60:
    print("妈妈给他买本参考书")
elif chengji>=0:
    print("什么都不买")
else:
    print("输入错误")
